BARSKA 20x 40x Binocular Stereo Microscope High-performance microscope, ideal for general medical and industrial use, hobbyists and collectors, and educational purposes Transmitted and oblique illumination; head rotates 360 degrees; adjustable inter-pupillary distance; coarse knob adjustment; aluminum alloy and copper body; WF10x, 20-millimeter eyepiece system Monocular tube slanted at 45-degree angle; 10X wide field eyepiece; 20X, 40X magnification; 2X, 4X objective lens; 90-millimeter working distance; 11-pound weight Includes spare bulb, fuse, power cord, specimen plate, and plastic dust cover Includes limited one-year manufacturer's warranty